Genetic growth potential, rather than phenotypic size, predicts migration phenotype in Atlantic salmon.

ABSTRACT: Knowledge of the relative importance of genetic versus environmental determinants of major developmental transitions is pertinent to understanding phenotypic evolution. In salmonid fishes, a major developmental transition enables a risky seaward migration that provides access to feed resources. In Atlantic salmon, initiation of the migrant phenotype, and thus age of migrants, is presumably controlled via thresholds of a quantitative liability, approximated by body size expressed long before the migration. However, how well size approximates liability, both genetically and environmentally, remains uncertain. We studied 32 Atlantic salmon families in two temperatures and feeding regimes (fully fed, temporarily restricted) to completion of migration status at age 1 year. We detected a lower m

SUBMITTER: Debes PV 

PROVIDER: S-EPMC7423655 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature